Roller-truck.



M. A,- DEMUTH.

ROLLER TRUCK. APPLICATION F |LED JAN.3. 1916.

1,217,159. Patented Feb. 27, 1917'. v

NMA/fred Denial/1 I I W.

MAX ALFRED DEMUTH, OF SPOKANE, WASHINGTON.

ROLLER-TRUCK.

Specification of Letters Patent.

Patented Feb. 27,1917.

Application filed January 3, 1916. Serial N 0. 70,009.

To all whom it may concern:

Be it known that I, MAX ALFRED DEMUTH, a citizen of the United States, residing at Spokane, in the county of Spokane and State of l/Vashington, have invented certain new and useful Improvements in Roller- Trucks, of which the following is a specifi cation. i

This invention relates toimprovements in roller trucks for printing presses and one of the principal objects is to provide a novel means for varying or changing the diameter of the trucks so as to obtain the desired action of the ink rollers, by means of which ink is distributed with requisite efiiciency upon the type or other medium utilized.

It is well known, among printers, that inking rollers are subject'to various conditions which result in changing their effective diameter, and when such change occurs, it is impossible to get a correct distribution of ink with the same radius or diameter of roller truck initially applied to the inking roller when the latter is first put into service. Various mechanical expedients have been resorted to with a view of enabling a printer to readily change the diameter of roller trucks but so far as I am aware these devices have not been put in practice because of various defects, all of which are clear to the skilled printer.

One of the novel features of my inven tion is a construction which provides for minute gradations of diameter of the roller truck in such a manner as to enable a printer to gage the reduction of his inking roller with the utmost precision and employ a roller truck of the requisite diameter.

This feature of my invention is carried out by providing a roller having inter changeable truck rims of graduated sizes and I prefer to employ truck rims formed of non-metallic material, such as fiber for instance, so as to avoid a metal to metal contact between the track and the roller.

Other features and objects of my invention will be more fully described in connection with the accompanying drawing and will be more particularly, pointed out in and by the appended claims.

In the drawing Figure 1 is a perspective view of one end of an inking roller equipped with a roller truck embodying one form of my invention.

Fig. 2 is a view in side elevation of one end of the roller with the truck structure in section.

Fig. 3 is a perspective view of the roller truck detached from-the truck structure.

F 1g. 4 is ap'erspective detached view of My improved roller truck structure is mounted in a fixed manner upon the bearing or journal 2, and in the most improved embodiment, said roller includes a locking sleeve 3 which may be locked to form the bearing 2 in any desirable manner as by means of a key 4. The locking sleeve 3 is provided with a flat end 5 adapted to abut against the end-of the inking roller. Said locking sleeve is suitably reduced to form a shoulder 6, and is provided with a truncated conical periphery 7, extending for appreciably a third the length of the sleeve, and functioning to interiorly engage the bore of the roller truck, presently to be described, in a manner to support the latter. I prefer to taper the conical periphery 7, toward the end 8, of bearing 2. The locking sleeve is further reduced and exteriorly threaded as indicated at 9, for a portion of the remainder of its length, a smooth peripheral end being indicatedat 10.-

' 'My improved roller truck comprises a truck" body 11 provided with an enlarged diameter forming atrack tread 12, and a reduced diameter 13, extending from the enlarged diameter. Interiorly, the roller truck is bored to fit over and about the looking sleeve, and one end of the boreis provided witha shoulder 14, to fit over and against the shoulder of the locking sleeve. That portion of the bore of the truck fitting over the tapered holding periphery 7 is correspondingly tapered as indicated at 15, this taper extending for appreciably one-half the length of the roller truck, in the particular form shown. The remainder of the bore of said truck tapers outwardly, as indicated at 16, and is provided with a shoulder engaging recess 17. Thus it will be seen that the bore of the roller truck tapers axially of the truck in a manner to dispose the smallest diameter substantially at the center of its axial length, and to present opposing tape-rs to the holding mechanism.

A locking nut 17 is interiorly threaded as at 18, so as to be turned onto the threaded extension 9 of the locking sleeve. Spanner openings 19 are provided for the application of a spanner or like instrument to said nut for tightening the latter. The periphery of the locking nut is tapered away from the end 8, of bearing 2, as indicated at 20, to engage the tapered portion 16 of the truck bore. Further, said nut also n'ovided with a flange 21 adapted to lit flush with the end of the roller truck by seating in the recess 17, as will be seen more particularly by reference to Fig. 2.

Now it will be clear that by providing each inking roller with a plurality of roller truck rims of gradated diameters, the truck rims can readily be interchanged in accordance with the shrinkage suffered by the inking roller, and that such change can be made with the greatest facility.

It will. also be clear that the truck rim 11 is locked in position on the truck structure, namely the locking sleeve and locking nut, and further, this frictional anchorage is not only rendered more eiticient by the opposing tapered construction of the parts, but is rendered highly effective and is supplemented by the endwise engaging action of the flanges 6 and 21. 7

It is believed that the advantages and utility of my invention will be fully understood from the foregoing description, and while I have herein shown and described one Copies of this patent may be obtained for five cents each, by addressing the specific form of my invention I do not wish to be limited thereto except for such limitations as the claims may import.

1. In a printing press roller truck, a roller bearing, a sleeve locked on said bearing and provided with peripheral and endwise truck holding portions and having a threaded eX- tension, a roller truck mounted on said sleeve and in endwise engagement with one of the portions of said sleeve and projecting over said threaded extension, and a lock nut threaded on said extension and interiorly engaging said truck and provided with a flange engaging the remaining end of said truck to lock the latter in position, substantially as described.

2. In a printing press roller truck, a roller bearing a sleeve locked on said bearing and provided with a peripheral truck holding portion and an endwise truck holding portion and having a threaded extension projecting from said first mentioned holding portion, a roller truck mounted on said sleeve and projecting over said extension, and a lock nut threaded on said extension and interiorly engaging said truck to lock the same in position, and an endwise truck holding portion engaging the remaining end of said truck, substantially as described.

3. In a printing press roller truck, a roller bearing, a sleeve locked on said bearing and provided with a peripheral truck holding portion and an endwise truck holding portion, a roller truck reversibly mounted on said sleeve, a nut for locking said truck on said sleeve, and means for engaging the end of said roller truck against endwise movement, substantially as described.

In testimony whereof I ail'lX my signature.

MAX ALFRED DEh IUTH.

Commissioner of Patents,

Washington, D. G. 

